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US 8,783,426 B2Granted
Movable barrier hydraulic braking
AssigneeThe Chamberlain Group, Inc.
InventorsRoger William Lhotak, Brian Roy Skotty
Life of this patent
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Abstract
A hydraulic brake apparatus, a movable barrier apparatus, a hydraulic brake kit, a method of stopping movement of a movable barrier, and a method installing a hydraulic brake assembly are described herein. A selectively operable piston mechanism converts rotation of a drive shaft of a movable barrier into hydraulic pressure used to operate a brake configured to stop movement of the drive shaft.
Claims8
A method of impeding rotation of a drive shaft to stop movement of a movable barrier, the method comprising:
- converting rotational movement of a drive shaft into linear movement of a piston within a piston pump;
- creating pressure within a hydraulic line fluidly connected to the piston pump by operation of the piston pump;
- the pressure driving a brake pad into frictional engagement with a brake member coupled to the drive shaft.
Dependencies are inferred from the claim text.